Figure 10.

Experimental [formamide (FA, magenta strip), Gly and Ala taken, respectively, from Refs. ³¹, ²⁸] and calculated π^* resonance energies for FA (magenta strip) and Gly- (red strips) and Ala- (blue strips) based peptides with β-strand (a) and 3₁₀-helical (b) conformations. In the case of dimers and trimers, statistical coil conformations optimized from initial geometry parameters typical for helical conformers (not shown) and some bent conformers (not shown) have been found to have lower π^* resonance energies than these conformers (see text).